osiris said:
I need to do the same with the Z4, lots of scratches and swirls and little dents here and there that need to get sorted
What is a baggie test?
After washing and drying your car, the next thing you want to do is to inspect the paint for what we call,
Above Surface Bonded Contaminants
These contaminants can be,
Tree Sap, Mist, Industrial Fallout, Overspray Paint, Air-borne Dirt and Dust Pollution, Road Grime. You can check for above surface bonded contaminants by feeling the horizontal surfaces with your clean, bare hand using your sense of touch to detect what will feel like little bumps or surface texture on the finish. This type of inspection works well and is a good general indicator of above surface bonded contaminants.
To do "The Baggie Test", simply use a clean plastic bag by placing your hand inside the baggie and then feeling the horizontal surfaces like the bonnet, roof and boot lid. The film of plastic acts to intensify the surface texture created by contaminants bonded to the paint making it more dramatic to your sense of touch when you feel the paint through the baggie.
If the paint feels rough its time to clay.
And in anyway, before you polish a car you have to clay it in any case.
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